引用本文: | 黄祖委,黄智鹏,杨夏,等.含源配电网的无功电压分段自适应自治控制策略[J].电力系统保护与控制,2019,47(9):10-18.[点击复制] |
HUANG Zuwei,HUANG Zhipeng,YANG Xia,et al.Reactive voltage control strategy based on adaptive autonomous segment for distribution network with sources[J].Power System Protection and Control,2019,47(9):10-18[点击复制] |
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摘要: |
针对分布式电源(DG)接入配电网产生的电压越限问题,可以利用DG逆变器输出的无功功率为含源配电网提供无功支撑以解决电压越限问题。提出含源配电网的无功电压分段自适应自治控制策略。首先通过采集当前时刻DG并网点电压和并网点处馈线流过的有功功率方向。然后根据采集到的信息动态自适应调整触发电压临界值,触发电压临界值将并网点电压运行值划分为五个区间。其次根据DG并网点电压所处区间使用Q(U)控制策略计算DG无功输出目标值。最后控制DG逆变器输出无功追踪该目标值。将所提方法与不考虑DG无功调控能力方案、基于定参数的Q(U)控制方案进行综合比较,仿真结果表明所提控制策略在解决电压越限问题、抑制电压扰动、提高电压质量等方面均有显著的效果。 |
关键词: 含源配电网 电压越限 分段自适应 自治 Q(U)控制 |
DOI:10.7667/PSPC180568 |
投稿时间:2018-05-14修订日期:2018-11-06 |
基金项目:广东电网有限责任公司科技项目(GDKJXM 20162615);国家自然科学基金资助(51777077) |
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Reactive voltage control strategy based on adaptive autonomous segment for distribution network with sources |
HUANG Zuwei,HUANG Zhipeng,YANG Xia,YI Yingqi,GAO Xiaojing,ZHAI Jianwei |
(Heyuan Power Supply Bureau, Guangdong Power Grid Co., Ltd., Heyuan 517000, China;Guangzhou Power Electrical Technology Co., Ltd., Guangzhou 510670, China;School of Electric Power, South China University of Technology, Guangzhou 510640, China) |
Abstract: |
This paper focuses on the problem that the voltage exceeds the limit range when Distributed Generation (DG) is connected to distribution network. Reactive power of DG inverter can offer reactive support to solve the voltage problem. The reactive voltage control strategy based on adaptive autonomous segment for Distribution Network with Sources (DNS) is put forward in this paper. Firstly, this strategy can adaptively adjust the trigger voltage thresholds by collecting the information about the voltage of Point of Common Coupling (PCC) of DG and the direction of active power flow through next feeder adjoining the PCC of DG. Then, the threshold value of trigger voltage is adjusted dynamically according to the collected information. The run value of the PCC of DG can be divided to five intervals by the trigger voltage thresholds. Secondly, according to the interval that the voltage of PCC of DG is in the reference values about reactive power outputs of DG inverter can be calculated by using the Q(U) control method. Finally, the reactive output of the DG inverter is controlled to trace the reference value. This research is comprehensively compared with the case without the reactive support of DG inverter and the case where DG inverter operates using the Q(U) control strategy with constant segmented voltage threshold. The simulation result shows that the proposed method has a significant improvement on reducing the voltage exceeding the limits range, restraining the voltage disturbance and improving the voltage quality. This work is supported by Guangdong Power Grid Co., Ltd. Science and Technology Project (No. GDKJXM20162615) and National Natural Science Foundation of China (No. 51777077). |
Key words: distribution network with source voltage exceeding the specified limits adaptive segment autonomy Q(U) control |